package com.fmjr.common.bfb.cap.sdk_refactoring;

public class HexStringByte {
	public static String stringToHex(String bin) {
		char[] digital = "0123456789ABCDEF".toCharArray();
		StringBuffer sb = new StringBuffer("");
		byte[] bs = bin.getBytes();

		for (int i = 0; i < bs.length; i++) {
			int bit = (bs[i] & 0xF0) >> 4;
			sb.append(digital[bit]);
			bit = bs[i] & 0xF;
			sb.append(digital[bit]);
		}
		return sb.toString();
	}

	public static String hexToString(String hex) {
		String digital = "0123456789ABCDEF";
		char[] hex2char = hex.toCharArray();
		byte[] bytes = new byte[hex.length() / 2];

		for (int i = 0; i < bytes.length; i++) {
			int temp = digital.indexOf(hex2char[(2 * i)]) * 16;
			temp += digital.indexOf(hex2char[(2 * i + 1)]);
			bytes[i] = ((byte) (temp & 0xFF));
		}
		return new String(bytes);
	}

	public static String byteToHex(byte[] b) {
		String hs = "";
		String tmp = "";
		for (int n = 0; n < b.length; n++) {
			tmp = Integer.toHexString(b[n] & 0xFF);
			if (tmp.length() == 1)
				hs = hs + "0" + tmp;
			else {
				hs = hs + tmp;
			}
		}
		tmp = null;
		return hs.toUpperCase();
	}

	public static String byteToHex2(byte[] b) {
		String hs = "";
		String tmp = "";
		for (int n = 0; n < b.length; n++) {
			tmp = Integer.toHexString(b[n] & 0xFF);
			if (tmp.length() == 1)
				hs = hs + "0x0" + tmp;
			else {
				hs = hs + "0x" + tmp;
			}
		}
		tmp = null;
		return hs;
	}

	public static byte[] hexToByte(byte[] b) {
		if (b.length % 2 != 0) {
			throw new IllegalArgumentException("输入长度不是偶数");
		}
		byte[] b2 = new byte[b.length / 2];
		for (int n = 0; n < b.length; n += 2) {
			String item = new String(b, n, 2);

			b2[(n / 2)] = ((byte) Integer.parseInt(item, 16));
		}
		b = (byte[]) null;
		return b2;
	}

}